Puzzle over three-headed frog?

[Umbran]

Certainly mutagens could be one cause, and probably the most likely given how it basically seems as if three tadpoles merged together - I would imagine something broke down the tadpoles' coverings, whatever they are.

Generally speaking, if you've got this sort of irregularities in a body part, they must arise before or during the development of that part. Tadpoles don't have legs, so you can muck with the development of those legs while the tadpole is swimming around. However, when they hatch, tadpoles have heads. Therefore, any problem that'd give them multiple heads must have arisen at or before the egg stage.

 

[Gez]

That's a siamese frog. Three frogs rolled into one. Maybe they were conjoined since the tadpole stage. I know nothing of batracian biology, so maybe it's not possible, but that's the scenario I would assume.

 

[Gez]